sew them together into blocks. trim to size. Alternate with solid squares. Sew the rectangles in long strips for the border.
You will probably need additional coordinating fabric. I would use solid fabric.
This is the kind of treasure we sometime find and the pleasure and creativity is just rendomanlly sewing them together without worrying about a pattern. I did a similar quilt using poka dots in 5 colors and 3 sizes of poka dots. Very random, no attention to matching and it was the most rewarding quilt I have ever made. Sometime we have to let maddness take over.